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Income Taxes - Narrative (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Income Tax Disclosure [Abstract]        
Income Tax Expense (Benefit) $ (9.4) $ 10.2 $ (2.4) $ 18.6
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     21.00%